Optical transceiver including a plurality of transmitter units and a process to control the same
AssigneeSumitomo Electric Industries, Ltd.
InventorHirotaka OOMORI
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Abstract
An optical transceiver is disclosed in which the optical output thereof is controlled without degrading the signal quality. The optical transceiver of the invention includes a plurality of transmitter units and a controller that adjusts the bias current of respective transmitter units. The controller, receiving information to decrease/increase the output of the optical transceiver, decides a unique unit that has a largest margin to increase/decrease the bias current and provides a control signal only to the unique unit to increase/decrease the bias current.
Claims13
An optical transceiver comprising:
- a plurality of transmitter units each installing a semiconductor laser diode and a bias current source, said semiconductor laser diode being provided with a bias current from said bias current source;
- an optical multiplexer configured to multiplex optical signals output from respective transmitter units;
- and
- a controller to control an optical output of said optical transceiver,
- wherein said controller decides one of transmitter units that has a widest margin of said bias current when said controller receives information to increase or to decrease said optical output, and provides a control signal to said bias current source in said decided transmitter unit, and
- wherein said bias current source in said decided transmitter unit increases or decreases said bias current by a preset step.
A process to control an optical output of an optical transceiver that installs a plurality of transmitter units each including a laser diode and a bias current source, an optical multiplexer configured to multiplex optical signals each output from said transmitter unit to generate said optical output, and a controller, said process comprising steps of:
- deciding an increasing margin of a bias current provided to said laser diode from said bias current source when said controller receives information to increase said optical output of said optical transceiver, or a decreasing margin when said controller receives information to decrease said optical output;
- identifying one of said transmitter units that has a widest increasing margin or a widest decreasing margin of said bias current;
- and
- providing a control signal to said identified transmitter unit so as to increase or to decrease said bias current provided to said laser diode by a preset increasing step or a preset decreasing step.
Dependencies are inferred from the claim text.